US7573905B2ExpiredUtilityPatentIndex 92

Methods and systems for communicating SS7 messages over packet-based network using transport adapter layer interface (TALI)

Assignee: TEKELEC USPriority: Dec 4, 1998Filed: Jul 12, 2005Granted: Aug 11, 2009

Est. expiryDec 4, 2018(expired)· nominal 20-yr term from priority

Inventors:BENEDYK ROBBY DARREN SPRAGUE DAVID MICHAEL BRENDES DAN ALAN

H04L 65/1101H04L 43/50H04M 7/066H04L 65/103H04Q 3/0045H04L 65/1043H04Q 3/0025H04L 65/104H04L 69/32H04L 69/08H04L 69/325H04L 69/085H04L 69/329H04L 69/326

PatentIndex Score

Cited by

533

References

Claims

Abstract

A transport adapter layer interface (TALI) includes messages, processes, and packet structures for sending and receiving SS7 information over a stream-oriented connection, such as a TCP/IP connection. For example, the TALI interface includes test messages for testing the status of a connection and allow and prohibit messages for enabling and disabling service data communications without invoking a TCP handshaking procedure. The TALI interface also includes SYNC and LENGTH fields for facilitating extraction of individual message packets over a stream-oriented connection.

Claims

exact text as granted — not AI-modified

What is claimed is:

1. A method for encapsulating a signaling connection control part (SCCP) message in an Internet protocol (IP) datagram using a transport adapter layer interface (TALI), the method comprising:
(a) receiving an SS7 message signal unit (MSU), the SS7 MSU including message transfer part (MTP) layers 1 , 2 , and 3 and an SCCP layer;
(b) discarding MTP layer 1 and 2 information from the SS7 MSU;
(c) placing the SCCP layer in a service portion of a TALI packet;
(d) adding a TALI header to the TALI packet;
(e) adding transport and network layer headers to the TALI packet; and
(f) sending the TALI packet over a stream-oriented connection.

2. The method of claim 1 comprising placing MTP layer 3 information without modification into the service portion of the TALI packet.

3. The method of claim 1 comprising extracting MTP layer 3 information from the SS7 MSU and placing the MTP layer 3 information in the SCCP layer.

4. The method of claim 3 wherein extracting MTP layer 3 information includes extracting an originating point code (OPC) value from the SS7 MSU and placing the MTP layer 3 information in the SCCP layer includes placing the OPC value in a calling party address field in the SCCP layer.

5. The method of claim 3 wherein extracting MTP layer 3 information includes extracting a destination point code (DPC) value from the SS7 MSU and placing the MTP layer 3 information in the SCCP layer includes placing the DPC value in a called party address field in the SCCP layer.

6. The method of claim 1 comprising setting a SYNC field in the TALI packet to a predetermined value indicating the beginning of the TALI packet for stream-oriented communications.

7. The method of claim 1 comprising setting a LENGTH field in the TALI packet to a value indicative of the LENGTH of the service portion of the TALI packet.

8. The method of claim 1 comprising setting an OPCODE field in the TALI packet to a predetermined value for identifying the TALI packet as an SCCP packet.

9. The method of claim 1 wherein adding a transport layer header to the TALI packet includes adding a stream-oriented transport layer header to the TALI packet.

10. The method of claim 9 wherein adding a stream-oriented transport layer header to the TALI packet includes adding a transmission control protocol (TCP) header to the TALI packet.

11. A method for encapsulating a message transfer part layer 3 (MTP3) packet in an Internet protocol (IP) datagram using a transport adapter layer interface (TALI), the method comprising:
(a) receiving an MTP3 message signal unit (MSU), the MTP3 MSU including MTP layers 1 , 2 , and 3 ;
(b) discarding MTP layers 1 and 2 from the MTP3 MSU;
(c) placing MTP layer 3 information from the MTP3 MSU in a service portion of a TALI packet;
(d) adding a TALI header to the TALI packet;
(e) adding transport and network layer headers to the TALI; and
(f) sending the TALI racket over a stream-oriented connection.

12. The method of claim 11 wherein placing the MTP layer 3 information in the service portion includes placing a routing label and a service indicator octet (SIO) in the service portion of the TALI packet.

13. The method of claim 12 wherein placing the MTP layer 3 information in the service portion includes placing layer 3 information in addition to the routing label and the SIO in the service portion of the TALI packet.

14. The method of claim 13 wherein placing information in addition to the routing label and the SIO includes placing network management information in the service portion of the TALI packet.

15. The method of claim 14 wherein placing network management information in the service portion of the TALI packet includes placing changeover information in the service portion of the TALI packet.

16. The method of claim 14 wherein placing network management information in the service portion of the TALI packet includes placing changeback information in the service portion of the TALI packet.

17. The method of claim 14 wherein placing network management information in the service portion of the TALI packet includes placing flow control information in the service portion of the TALI packet.

18. The method of claim 13 wherein placing information in addition to the routing label and the SIO includes placing network testing information in the service portion of the TALI packet.

19. The method of claim 18 wherein placing network testing information in the service portion of a TALI packet includes placing signaling-route-set-test information in the service portion of the TALI packet.

20. The method of claim 11 comprising setting a SYNC field in the TALI packet to a predetermined value indicating the beginning of the TALI packet for stream-oriented communications.

21. The method of claim 11 comprising setting a LENGTH field in the TALI packet to a value indicative of the LENGTH of the service portion of the TALI packet.

22. The method of claim 11 comprising setting the OPCODE field to a predetermined value for identifying the TALI packet as an MTP3 packet.

23. The method of claim 11 comprising adding an application layer sequence number to the TALI packet.

24. The method of claim 23 comprising adding an application layer sequence number includes adding a service specific connection oriented protocol (SSCOP) trailer to the TALI packet.

25. The method of claim 11 wherein adding a transport layer header to the TALI packet includes adding a stream-oriented transport layer header to the TALI packet.

26. The method of claim 25 wherein adding a stream-oriented transport layer header to the TALI packet includes adding a transmission control protocol (TCP) header to the TALI packet.

27. A computer program product comprising computer-executable instructions embodied in a computer-readable medium for performing steps comprising:
(a) receiving an SS7 message signal unit (MSU), the SS7 MSU including message transfer part (MTP) layers 1 , 2 , and 3 and an SCCP layer;
(b) discarding MTP layer 1 and 2 information from the SS7 MSU;
(c) placing the SCCP layer in a service portion of a TALI packet;
(d) adding a TALI header to the TALI packet;
(e) adding transport and network layer headers to the TALI; and
(f) sending the TALI racket over a stream-oriented connection.

28. The computer program product of claim 27 comprising placing MTP layer 3 information without modification into the service portion of the TALI packet.

29. The computer program product of claim 27 comprising extracting MTP layer 3 information from the SS7 MSU and placing the MTP layer 3 information in the SCCP layer.

30. The computer program product of claim 29 wherein extracting MTP layer 3 information includes extracting an originating point code (OPC) value from the SS7 MSU and placing the MTP layer 3 information in the SCCP layer includes placing the OPC value in a calling party address field in the SCCP layer.

31. The computer program product of claim 29 wherein extracting MTP layer 3 information includes extracting a destination point code (DPC) value from the SS7 MSU and placing the MTP layer 3 information in the SCCP layer includes placing the DPC value in a called party field address in the SCCP layer.

32. The computer program product of claim 23 comprising setting a SYNC field in the TALI packet to a predetermined value indicating the beginning of the TALI packet for stream-oriented communications.

33. The computer program product of claim 27 comprising setting a LENGTH field in the TALI packet to a value indicative of the LENGTH of the service portion of the TALI packet.

34. The computer program product of claim 27 comprising setting an OPCODE field in the TALI packet to a predetermined value for identifying the TALI packet as an SCCP packet.

35. A computer program product for comprising computer-executable instructions embodied in a computer-readable medium for performing steps comprising:
(a) receiving an MTP3 message signal unit (MSU), the SS7 MSU including MTP layers 1 , 2 , and 3 ;
(b) discarding MTP layers 1 and 2 from the MTP3 MSU;
(c) placing MTP layer 3 information from the MTP3 MSU in a service portion of a TALI packet;
(d) adding a TALI header to the TALI packet;
(e) adding transport and network layer headers to the TALI; and
(f) sending the TALI racket over a stream-oriented connection.

36. The computer program product of claim 35 wherein placing the MTP layer 3 information in the service portion includes placing a routing label and a service indicator octet (SIO) in the service portion of the TALI packet.

37. The computer program product of claim 36 wherein placing the MTP layer 3 information in the service portion includes placing layer 3 information in addition to the routing label and the SIO in the service portion of the TALI packet.

38. The computer program product of claim 37 wherein placing information in addition to the routing label and the SIO includes placing network testing information in the service portion of the TALI packet.

39. The computer program product of claim 38 wherein placing network testing information in the service portion of a TALI packet includes placing signaling-route-set-test information in the service portion of the TALI packet.

40. The computer program product of claim 36 wherein placing information in addition to the routing label and the SIO, includes placing network management information in the service portion of the TALI packet.

41. The computer program product of claim 40 wherein placing network management information in the service portion of the TALI packet includes placing changeover information in the service portion of the TALI packet.

42. The computer program product of claim 40 wherein placing network management information in the service portion of the TALI packet includes placing changeback information in the service portion of the TALI packet.

43. The computer program product of claim 40 wherein placing network management information in the service portion of the TALI packet includes placing flow control information in the service portion of the TALI packet.

44. The computer program product of claim 35 comprising setting a SYNC field in the TALI packet to a predetermined value indicating the beginning of the TALI packet for stream-oriented communications.

45. The computer program product of claim 35 comprising setting a LENGTH field in the TALI packet to a value indicative of the LENGTH of the service portion of the TALI packet.

46. The computer program product of claim 35 comprising setting the OPCODE field to a predetermined value for identifying the TALI packet as an MTP3 packet.

47. The computer program product of claim 35 comprising adding an application layer sequence number to the TALI packet.

48. The computer program product of claim 43 comprising adding an application layer sequence number includes adding a service specific connection oriented protocol (SSCOP) trailer to the TALI packet.

49. A communications network element for implementing a transport adapter layer interface (TALI) protocol stack, the communications network element comprising:
(a) a TALI process for receiving SS7 messages, discarding SS7 layer 1 and 2 information from the SS7 messages, and for adding a TALI header to each of the SS7 messages to form TALI messages; and
(b) a stream oriented communications process for receiving the TALI messages from the TALI process, adding transport and network layer headers to the TALI messages, and forwarding the TALI messages to a receiving application over a stream-oriented connection based on the transport and network layer headers.

50. The communications network element of claim 49 comprising a data communications module (DCM) including hardware for sending and receiving messages over the stream-oriented connection, wherein the TALI process is implemented on the DCM.

51. The communications network element of claim 50 wherein the stream-oriented communications process is implemented on the DCM.

52. The communications network element of claim 49 wherein the stream oriented communications process is adapted to receive a stream of TCP data from the IP network.

53. The communications network element of claim 52 wherein the TALI process is adapted to receive the stream of TCP data from the TCP/IP process and to identify individual TALI message boundaries in the stream.

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